Personally, I wouldn't do it. The NTSC color gamut is just a standard referencing the amount of color a given monitor can display. Most LCDs will provide 70 -75% of the gamut and is suitable for virtually anything you want to do. A 90% color gamut will allow better representation of color for professional graphics/video editing.
Spend your $150 on an SSD upgrade, or more RAM or just take your honey out to dinner with it.